System safety concept INDEX

In application of inherent safety concepts, I2SI indexing system is used for quantification of process units and equipment response. 

In order to reflect these lead times, the concept of a timestamp is introduced. Timestamp is used in computer science documenting the system time when a certain event or transaction occurs e.g. for logging events (N.N. 2007). In the context of future inventory value planning, the time-stamp marks the period, when the first raw material has reached a certain stage in the value chain network included into a specific product. In the example illustrated in fig. 57, the raw material is processed in the same period to be converted into product 1. Therefore, all four value chain steps indexed from one to four occur in the same period and have the same time-stamp one. Conversion into product 2, however, requires additional time caused by production lead times, safety inventory and/or transportation time, that the steps indexed with five and six have a time stamp of two. The timestamp reflects that the inventory value of product 2 is not based on the raw material costs from the same period but based on the raw material costs from the previous period in order to reflect the lead time. Consequently, value chain indices and timestamps are defined for all steps and can cover multiple periods reflecting that raw materials in a global complex multi-stage value chain network can take several months, until they are sold as part of a finished product to the market. 

CGA V-5, Diameter Index Safety System, describes standards for noninterchangeable connections for pressures of 200 psig (1380 kPa) and less for medical regulator outlets and connections for anesthesia, resuscitation, and therapy apparatus [5]. This system of connections, referred to as the Diameter Index Safety System (DISS), is based on a concept of noninterchangeable indexing achieved by a series of increasing and decreasing diameters in the component parts of the connections. 

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